Pocket Pet · Rattus norvegicus var. domestica · typical adult weight 0.25–0.70 kg
Trimethoprim-Sulfamethoxazole is used in pet rat for Strep pneumoniae / secondary cover. Routes documented in pet rat: PO. A typical adult pet rat weighs 0.25–0.70 kg. ExoticRx lists 1 cited dose rule for Trimethoprim-Sulfamethoxazole in pet rat, drawn from published veterinary references. Verify against current literature before clinical use.
Trade names: Bactrim, TMS
| Route | Dose | Frequency | Indication | Evidence | Source |
|---|---|---|---|---|---|
| PO | 30 mg/kg | q12h | Strep pneumoniae / secondary cover | Moderate | ExoticRx 2026 (rat dosing guide); Carpenter 6e |
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These ranges are per kg. Enter your pet rat's weight to get the precise dose and draw-up volume — unit and concentration math done for you.
Sequential blockade of folate synthesis: sulfamethoxazole inhibits dihydropteroate synthase; trimethoprim inhibits dihydrofolate reductase.
May cause keratoconjunctivitis sicca (KCS) in dogs with prolonged use. Can cause bone marrow suppression. Avoid in animals with hepatic disease. Adequate hydration required.
Species-specific contraindications and adverse-reaction reports for pet rat may differ from canine / feline reference data — consult the primary citations listed with each rule.
Why a species-specific page? Trimethoprim-Sulfamethoxazole pharmacokinetics differ across species: dose ranges, intervals, and route preferences are not interchangeable. Cross-extrapolation from canine doses is unsafe in pet rat — the rules above are the citations specific to this species, not generic recommendations.
Sourced from published veterinary references; awaiting credentialed clinical reviewer. See our editorial process. Reference only — not veterinary advice.